shonkinite
English
[edit]
Etymology
[edit]From Shonkin + -ite, after the type locality at Shonkin Sag in the Highwood Mountains of north-central Montana.
Noun
[edit]shonkinite (countable and uncountable, plural shonkinites)
- (mineralogy) A kind of mafic foidal syenite.
- 1954, J. C. Olson, D. R. Shawe, L. C. Pray, W. N. Sharp, Rare-Earth Mineral Deposits of the Mountain Pass District, San Bernadino County, California, U.S. Geological Survey, Professional Paper 261, page 22:
- Much of the southern half of the southeastern body is a mafic syenite, slightly more felsic than the shonkinite.